1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f65e49d7872911c0cd580177914f1a6cbd5c8b159110c2e524dacf2d92c840. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/381008ee-7ac9-4dd1-afbd-bf91a137683b.json and https://artists.proofprofile.net/proofs/artist/381008ee-7ac9-4dd1-afbd-bf91a137683b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216234b7b3d979da90919ab54e87a5c8f03ddfee83bc0e4d71d6b773cfade1b1. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYW2093814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480d16ba3e9f352ca8abcbe33af48615f9b0d3817ec9a1dfc9e5f52b0885c82a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA62276031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf49cac9c251d0bbf31c0b0ac96400b5bf475281fb51ff10851eeaca37aebb2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82302137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e77bf1cec002d023de29fc3323c15cefaec6d0913df2837f6cd53d6d59c7892. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82302141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa315994d1f626d07c2507c5189eabaa482ba703a082e08d720660b417738e627. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82302144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e486c45e623e4a90b7f3f851d870bc6363010d35c7394c6a6329b79b51cfc7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82302145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a5afbf37b4b985a876e6f47ca7caabb920cf2ace49fe422e2b52c331d2a3fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82302134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f7fe95341c52dcbc996d7d149d4ca25ecafadba4ff2251d06bbfa1f49e7911. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82302136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d748b85e4cc6532e574d3d5028c3867cbc36812f55f9687f4a9498cb65ae020. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82302138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7afeed00a2cfd058e7b9009ccef6bec22ebdcd12267c50770e22347dd85b7e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82302139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fc38b6f5639930359aae0f8ee124c9d577e8d9028c8147ef5ab3ea4583397b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2307453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddaa93350cdf4d77b27d999f5029e1861b641ab68f9673b989ebb64227c454b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB72391122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddaa93350cdf4d77b27d999f5029e1861b641ab68f9673b989ebb64227c454b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB72391122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e42043be7e0e75541f9fe75c872a8af3024c901e42a44c25548112e6bb40299. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2367156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bf3d7b9c5f65bbe8e988257e1d16d203db73372f5d0b7b9297dbcaa34b9da2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2367159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3011fa0e5d65c54097d9b0b91a4f531da4724a95f952189f5c26bd33518a4cc6. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2367163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdba54e16ef09d8b80964272e759a1272db69961e420ddb58e3fc343dc789ac8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2367167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d49861235240f707569ec8dfb5f7474889e47d9cf8d42792d679d6528b864e5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2446711.